CVE-2022-49411

CVSS 3.1 Score 7.8 of 10 (high)

Details

Published Feb 26, 2025
Updated: Mar 5, 2025
CWE ID 416

Summary

CVE-2022-49411 is a vulnerability affecting the Linux kernel's BFQ (Budget Fair Queuing) IO scheduler. The issue arises when bios are queued into the BFQ scheduler and associated with a cgroup that has been offlined. This can result in the use of freed memory by service tree users, leading to use-after-free issues. The vulnerability has been resolved by ensuring that only online bfq_groups are operated on, and if the associated bfq_group is not online, the first online parent is used instead.

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